I am a re-proofer so it is hard to say. I chuck all my work stuff and anything else around in the machine to re-proof regularly. Helps having a Nikwax trade account for the cost though.
They are light, but I spent most of today in thick merino baselayer, tights and the Dyno and was more than warm.
It is NOT a jacket for standing around in though from a warmth point of view.

The problem is, Al, the term "softshell" is completely undefinable. When it first appeared, it was linked to showerproof warmwear. Now, I'd always check out the fabric and manufacturers description before considering one.